What Is Insulation?
Insulation is used to prevent the progression of heat, electricity, sound, or even fire.
Insulation materials are placed in the walls of a building to insulate it from temperatures outside. While typically associated with preventing heat from escaping a home (and keeping cold air from getting in), insulation also keeps buildings cool in the summer. A well-insulated building will maintain a more even temperature throughout the year.
Insulation comes in various materials, including cellulose, rock and slag wool, natural fibers, and fiberglass. A bulkier material will resist conductive and convective heat flow, while rigid foam boards will trap air. Reflective foils are used in order to reflect radiant heat away from indoor spaces, making them ideal for cooling homes in warmer climates.